About

There are a number of demonstrations of how a pen attached to an axel on a rotating wheel can draw a
sine-wave
and other waveforms, and I wondered about drawing shapes using the waveform as input instead. This is
what
this
page
does.

Imagine a device with a pen that can move up and down, and its vertical position is controlled by the
incoming
waveform. The drawing surface is attached to a circular disc spinning at a constant speed. These are the
results.

Values

waveform: Choose the shape of the incoming wave.

rotation speed: Speed at which wheel rotates.

rotations: A pattern will eventually repeat. Some repeat after just 1 rotation, others might take
4 or
12
or 16. If the pattern looks incomplete, try increasing the number of rotations.